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The application of a reverse transcriptase inhibitor suppresses LTR retrotransposon mobilization in plants [RNA-seq]

ABSTRACT: The application of a reverse transcriptase inhibitor suppresses LTR retrotransposon mobilization in plants [RNA-seq]

PROVIDER: PRJNA807632 | ENA |

REPOSITORIES: ENA

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The application of a reverse transcriptase inhibitor suppresses LTR retrotransposon mobilization in plants [RNA-seq]

Project description:Recently developed methods applied to plant material, for example tissue culture during plant transformation, can induce genome instability by activating uncontrolled mobilization of LTR retrotransposons (LTR-TEs), the most abundant class of mobile genetic elements in plant genomes. Here we tested the use of Reverse Transcriptase inhibitors to avoid LTR-TE mobilization in plants. We demonstrated that the application of the drug Tenofovir in systems with high LTR-TE activity, like Arabidopsis and rice, allows generation of plants free from LTR-TE insertions without interfering with their development. We propose the use of Tenofovir as a new tool to both study LTR-TE transposition and to regenerate more genetically stable plant lines from tissue culture.

2023-01-06 | GSE196869 | GEO

The application of a reverse transcriptase inhibitor suppresses LTR retrotransposon mobilization in plants [ALE-seq]

2023-01-06 | GSE196868 | GEO

The application of a reverse transcriptase inhibitor suppresses LTR retrotransposon mobilization in plants [ALE-seq]

Project description:The application of a reverse transcriptase inhibitor suppresses LTR retrotransposon mobilization in plants [ALE-seq]

| PRJNA807629 | ENA

LTR-retrotransposon control by tRNA-derived small RNA

Project description:LTR-retrotransposon control by tRNA-derived small RNA

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LTR-retrotransposon control by tRNA-derived small RNA

Project description:Transposon reactivation is an inherent danger in cells that lose epigenetic silencing during developmental reprogramming. In the mouse, LTR-retrotransposons, or endogenous retroviruses (ERV), account for most novel insertions and are expressed in the absence of histone H3 Lysine 9 trimethylation in preimplantation stem cells. We found abundant, 18 nt tRNA-derived small RNA (tRF) in these cells, and ubiquitously expressed 22 nt tRFs, that include the 3' terminal CCA of mature tRNAs, and target the tRNA primer binding site (PBS) essential for ERV reverse transcription. We show that the two most active ERV families, IAP and MusD/ETn, are major targets and are strongly inhibited by tRFs in retrotransposition assays. 22 nt tRFs post-transcriptionally silence coding-competent ERVs, while 18 nt tRFs specifically interfere with reverse transcription and retrotransposon mobility. The PBS offers a unique target to specifically inhibit LTR-retrotransposons and tRF-targeting is a potentially highly conserved mechanism of small RNA-mediated transposon control.

2017-06-29 | GSE82199 | GEO

Arrested replication forks guide retrotransposon integration

Project description:Long Terminal Repeat (LTR) Retrotransposons are an abundant class of genomic parasites that replicate by insertion of new copies into the host genome. LTR retrotransposons prevent mutagenic insertions through diverse targeting mechanisms that avoid coding sequences, but a universal set of principles guiding their target site selection hasn’t been established. Here we show that insertion of the fission yeast LTR retrotransposon Tf1 is guided by the DNA binding protein Sap1, and that the efficiency and location of the targeting depend on the activity of Sap1 as a replication fork barrier. We propose that Sap1 guides insertion of Tf1 by blocking the progression of the replication fork, and that the Tf1 transposon uses features of arrested forks to insert into the host genome. These observations point to a universal mechanism for determination of LTR retrotransposon target site selection.

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Long noncoding RNAs transcribed by ERV-9 LTR retrotransposon act in cis to modulate long-range LTR enhancer function

Project description:Long noncoding RNAs transcribed by ERV-9 LTR retrotransposon act in cis to modulate long-range LTR enhancer function

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Mass spectrum for identifying the interacting proteins of telomerase reverse transcriptase

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2024-01-26 | PXD048859 | Pride

Reverse transcriptase inhibitors in Aicardi-Goutières syndrome

Project description:Aicardi-Goutières syndrome (AGS) is a genetically heterogeneous encephalopathy whose pathology is linked to an abnormal type I interferon response induced by self-derived nucleic acids. Data indicate that endogenous retroelements represent one source of interferon-stimulatory self-nucleic acid. No effective therapies are available for this disorder. In this pilot study involving patients with AGS due to mutations in TREX1, RNASEH2A, RNASEH2B or SAMHD1 three nucleoside analogue reverse transcriptase inhibitors (RTIs) were administered over 12 months. Transcription profiling was done by RNA-seq.

2018-12-12 | E-MTAB-7087 | biostudies-arrayexpress

Long noncoding RNAs transcribed by ERV-9 LTR retrotransposon act in cis to modulate long-range LTR enhancer function [RNA-Seq]

Project description:LTR retrotransposons are repetitive DNA elements comprising ~10% of the human genome. However, Whether or how the LTR lncRNAs serve biological functions is largely unknown. Here we show that in primary human erythroblasts, lncRNAs transcribed from the LTR retrotransposons of ERV-9 human endogenous retrovirus regulated transcription of key erythroid genes. Global knock-down of ERV-LTR lncRNAs was performed in the in vitro erythropoiesis system of human CD34 cells, and genome wide RNA-seq was carried out to detect the effect on transcription.

2017-01-07 | GSE93280 | GEO

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